[cisco-voip] 7937 Packet Loss and intermittent voice quality issues

[Ki Wi]

Do they have any security feature turns on ? such as DAI?

On Wed, Jan 6, 2010 at 3:08 AM, Mike Thompson <mthompson729 at gmail.com>wrote:

>  Or some sort of CDP / Spanning Tree weird thing going on.  Try turn off
> portfast on those port and see if it helps.  Look at the QoS on the ports
> too and check and see if there’s any inconsistency.
>
>
>
>
>
>
>
> *From:* cisco-voip-bounces at puck.nether.net [mailto:
> cisco-voip-bounces at puck.nether.net] *On Behalf Of *Ted Nugent
> *Sent:* Tuesday, January 05, 2010 12:39 PM
> *To:* Cisco VoIPoE List
> *Subject:* [cisco-voip] 7937 Packet Loss and intermittent voice quality
> issues
>
>
>
> I have a new customer install
>
> with 8 sccp 7937s and all of them are experiencing the same problem.
> Intermittently
>
> throughout the call they continue to lose voice for 5-10 seconds and then
> it
>
> clears back up for a few minutes and it occurs again. I can see on the web
>
> statistics for the phone that it appears to be losing packets (Rcvr Lost
>
> Packets  2483). This only appears to be occurring
>
> inbound to the device since the caller does not hear and audio issues.
> These devices
>
> are deployed throughout the company and all are experiencing the same
> issues at
>
> times. There are a couple bugs for g729 and g722 but we’re running g711
> (g722
>
> has been disabled clusterwide). They were experiencing the issue yesterday
> and
>
> I had the 7937 conference in a 7965 and the 7965 did not experience any
> voice
>
> issues so it’s not the call itself or callers phone. No other phones are
>
> experiencing the issues and I’ve upgrading the load from 1.3.3 to 1.3.4 and
> the
>
> problem still exists. Calls are hitting the PSTN via an MGCP controlled PRI
>
> however I’m not sure if that’s in play or not we have not been able to
>
> replicate the problem on internal calls but that’s not to say it’s not
> occurring
>
> because its intermittent.
>
> No Duplex Mismatches
>
> Cabling has been checked and
>
> device moved to new location with known good wiring
>
> CUCM 7.1.2.21900-5
>
> Any ideas?
>
>
>
>
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>
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